Neumann lived in Kiel in Schleswig-Holstein. Between 1983 and 1987 he strangled four women aged nineteen to forty, three of whom were working as prostitutes at the same premises. The killings arose in the course of arguments and following sex.
He was convicted and sentenced to life imprisonment in 1998: eleven years after the last of the killings, which indicates that the case was solved retrospectively, though nothing accessible says how.
The entire source base is a single encyclopaedia entry in the compressed notation this roster reproduces: sex, race, type, motive, method, disposition. No victim is named, no date is given beyond the range, and there is no account of the investigation, the arrest or the trial.
The entry is retained on the conviction and the sentence, and it should not be cited for anything more. It joins the small group of entries in this archive whose whole record is one summary paragraph.